How far does your social influence reach? How fast can you saturate your online network with information? Is there a way to quantify these metrics? Yes, of course there is!
Klout is a free web application that helps measure the effectiveness of your interaction with your social networks. It breaks down your “Klout Score” into several different comparisons as well as gives you a layman’s summary of what Klout thinks of your goings-ons of your social network.
Klout’s free (unregistered) version only supports measuring your Twitter statistics, so make sure to sign up to profile your reach on other social networks.